Santorini Port: Cruise to Volcano, Hot Springs & Thirassia

Santorini’s best views are not all found on the cliff tops. This six-hour caldera cruise takes you below Fira and Oia, to a smoking volcanic island, warm sulfur waters, and the quiet port of Thirassia. For $41, it packs a lot into one day.

I like the mix of active and easygoing stops. You can hike across Nea Kameni, cool off in the sea, then sit down for lunch on Thirassia while the boat handles the sightseeing. Guides such as Roula, Yannis, Georgia, Gianni, and Jonas have been praised for clear explanations and a friendly manner on different departures.

The main drawback is that this is not a soft, polished resort outing. The volcano trail is rocky, Thirassia involves a steep stair climb if you go to Manolas, and the hot springs stop is short. The water can look brown or yellow and may mark a pale swimsuit, so bring old swimwear and proper shoes.

Key points to know before you book

• Nea Kameni is a real walking stop: The optional trail to the crater crosses rough volcanic ground and costs an extra €5 in cash.
• The hot springs require a swim from the boat: You use foam noodles, not a beach or dock, and life jackets are supplied only for emergencies.
• Thirassia gives you free time: Eat by the harbor, walk the island, or climb the many steps toward Manolas for broad caldera views.
• The return sail is part of the attraction: You pass below Oia, Imerovigli, and Fira, seeing the famous cliffs from water level.
• Bring cash and sun protection: Drinks and food cost extra, the volcano fee is cash only, and there is little shade on the walking portions.
• Pickup changes the schedule: The Fira meeting point is at 10:15 a.m., while the pickup option leaves from Athinios Port at 9:45 a.m.

Why this cruise is a strong Santorini value

At $41 per person, this is one of the more sensible ways to see Santorini beyond its postcard villages. You are not paying only for a boat ride. The fare combines transport by sea, three distinct stops, an English-speaking guide, audio commentary, and a long return route around the caldera.

You still need to budget for the extras. The volcano entrance costs €5 in cash, food is not included, and drinks are sold at the onboard bar. If you use the cable car between Fira and the old port, the stated price is €12 each way. That means the final cost can rise, but the core cruise remains good value for a full half-day on the water.

I especially like that lunch on Thirassia is not tied to one fixed restaurant. You choose where to eat and how much time to spend walking. That freedom matters in Santorini, where some boat trips feel tightly controlled from start to finish.

The boat can fill up, yet the available reports describe enough seating, including a roof deck on some boats. Expect a shared excursion rather than a private sailing trip. If you want silence and personal service, pay more for a small-group cruise. If you want a broad look at the caldera without spending a fortune, this outing makes more sense.

Meeting at Fira Old Port

The standard meeting point is the Santo Star Office at Fira Old Port. Be there by 10:15 a.m. for the 10:30 departure. The port sits below Fira, so you need to allow time to reach it from the town above.

The cable car is the straightforward option, but it costs €12 each way according to the tour information. Some people use the steep walking route, while donkey rides are also available in the port area. Those choices involve more effort and are not suitable for everyone, especially in the heat.

If you select hotel pickup and drop-off, the schedule changes. The cruise leaves from Athinios Port at 9:45 a.m., and the pickup may use a nearby meeting point instead of stopping directly outside your hotel. The supplier sends the exact place and time by email, so check for that message at least a day before departure.

One practical weakness is that the Fira meeting office may not have a large, obvious sign. Give yourself extra time and keep the Santo Star name handy. The excursion requires the full names and birth dates of all participants for port authorities, so enter those details carefully when booking.

Sailing into the Santorini caldera

Once aboard, the boat gives you a different view of Santorini’s cliffs. From sea level, the island rises in layers of dark rock, pale stone, white buildings, and bright blue water. The route is as important as the stops, especially on the return journey beneath Oia, Imerovigli, and Fira.

An English-speaking guide travels with the group, and audio commentary adds information about the caldera and the islands. Guides on different departures have included Roula, Yannis, Georgia, Gianni, and Jonas. Their work is useful here because the scenery can otherwise become a quick series of photographs without much sense of how the volcanic islands formed.

The boat has a bar selling drinks, and a toilet is available. Food is not included, so bring water or buy it onboard. Some departures have offered reasonable drink prices, with occasional later discounts, but you should not rely on a special offer.

Choose your seat with the sun in mind. The roof deck gives you wide views, but the walking stops offer limited shelter. A hat, sunglasses, sunscreen, and a light cover-up will make the day more comfortable.

Walking across Nea Kameni’s volcanic ground

The first major stop is Nea Kameni, the volcanic island in the center of the caldera. You can take the optional hike toward the crater, passing over dark, rough ground shaped by past eruptions. It feels stark and unusual, more like a field of volcanic rock than a normal Greek island path.

The hike is not technical, but it is tiring. Reviews describe it as a hard slog for some people, while others find it manageable with good shoes. The trail has uneven surfaces, loose rock, and little shade. Wear trainers or sturdy walking shoes, not sandals with thin soles.

The €5 entrance charge must be paid in cash. Keep the money ready, since this small fee is not included in the booking price. You do not have to complete the whole climb. If the heat or footing becomes too much, you can walk partway and return to the boat.

At the top, the reward is not a grand monument. It is the view: a broad look across the caldera, with Santorini’s cliffs curving around the water. You also get a better sense of the island’s volcanic character than you would from a viewpoint in Fira.

The guide’s explanations are most useful here. The volcanic ground, crater area, and layers of rock make more sense when someone points out what you are seeing. Still, keep your expectations realistic. This is a natural site with rough paths, not a developed park with railings and visitor facilities.

Swimming at Palea Kameni’s warm springs

After the volcano, the boat continues to Palea Kameni for the hot springs stop. This is the most unusual part of the day, but it is not a spa experience. The boat anchors near the warm water, and you swim from the boat toward the shallow bay.

Foam pool noodles are provided. They help if you are not a confident swimmer, but they do not turn the stop into a supervised swimming pool. Life jackets are available only in an emergency, so you should be comfortable entering open water.

The swim is not especially long, but take care around submerged rocks. You may also want to wear your swimsuit under your clothes. The onboard toilet is small, and changing after the swim can be awkward.

The water is warmish rather than intensely hot, and the area can look rough around the edges. Sulfur gives the water a brown or yellow tint, and mud or minerals may discolor fabric. Wear a dark, older swimsuit. One smart idea is to bring a second layer of clothing for the boat ride afterward.

The stop can last about 30 minutes, which some people find too short. You have time to swim out, feel the warmer water, and return, but not much time for a leisurely soak. I would treat this as a memorable sea swim with warm sulfur water, not as a long therapeutic bath.

If you do not swim, you can remain on the boat and enjoy the view. That is a reasonable choice for anyone uneasy in open water. The volcano hike and Thirassia still give you plenty to do.

Free time on quiet Thirassia

Thirassia is the final main stop, and it changes the pace of the excursion. After the rocky volcano and the swim, you get time to eat, wander, and look back across the caldera toward Santorini.

The boat arrives near the waterfront, where you can find restaurants serving Greek food. Meals are not included, but the choice is yours. Prices and quality can vary, so take a quick look at menus before sitting down. Several people have enjoyed affordable local dishes, frappes, and baklava, while one poor meal experience shows why a little checking is worthwhile.

You can stay near the port and keep the afternoon easy. Or you can climb the long, winding steps toward Manolas, the hilltop village. The climb takes effort, especially after the volcano walk, but the views from above are wide and worthwhile for anyone in reasonable shape.

Donkey rides may be available at your own expense, though availability is not guaranteed. On some departures, walking was the only option. Do not count on an animal ride as a shortcut, and wear shoes with a good grip.

The amount of time here is a mixed point. Two hours gives you room for lunch and exploration, but some people feel it is too long if they stay only at the harbor. Others find it barely enough once they climb to Manolas. Your choice at this stop makes a big difference. Eat by the water for a relaxed visit, or walk uphill and accept that much of your free time will go toward the climb.

The long return past Oia and Fira

The return sailing is not simply transport back to port. The boat follows the caldera and gives you water-level views of the famous cliff towns. Oia looks different from below, and the layers of rock beneath Fira and Imerovigli are especially striking.

This is a good time to sit on the roof deck, listen to the commentary, and let your legs recover. Some departures have included music and a lively atmosphere, while others have felt more peaceful. The exact mood depends on the crew and the group, but the scenery stays the same.

The slow pace can be a plus or a drawback. If you want a relaxed final sail, it is a fine way to finish. If you are tired, sunburned, or anxious to get back to Fira, the extra time may feel long. I would bring water, keep a cover-up nearby, and see this part as a scenic cruise rather than a quick transfer.

What to pack for the six hours

A small day bag is enough. Pack:

• Comfortable shoes with a firm sole
• Swimsuit, preferably a dark one
• Towel and a dry change of clothes
• Hat, sunglasses, and high-factor sunscreen
• Cash for the €5 volcano fee, food, drinks, and possible cable car use
• Water, unless you plan to buy it onboard

The tour is not wheelchair accessible. It is also not recommended for people with walking disabilities or for strollers because of the rocky volcano path and steep, uneven steps. Children must be accompanied by an adult, and infant seats are not available.

The cruise does not allow pets. Free cancellation is available up to 24 hours before departure, and you can reserve now and pay later, which is useful when your Santorini plans may change.

Who should book this cruise?

I would choose this trip if you want to see several sides of Santorini in one outing: volcanic geology, open-water swimming, a small island village, and the caldera cliffs from below. It suits active couples, families with older children, and anyone who prefers a full day of varied stops to a short photo cruise.

I would hesitate if you dislike boats, cannot manage rocky ground, or want a quiet luxury sailing experience. The boat may be full, the volcano is exposed to the sun, and the hot springs are warm rather than spectacularly hot.

For most visitors, the price makes the trade-off worthwhile. Wear sensible shoes, bring cash, swim in an old dark swimsuit, and do not underestimate the climb at Thirassia. If those details sound manageable, this is a practical way to get beyond Santorini’s crowded viewpoints and see the island’s volcanic core from the water.

FAQ

Where does the cruise meet in Santorini?

The standard meeting point is the Santo Star Office at Fira Old Port. Meeting time is 10:15 a.m., with departure at 10:30 a.m.

Does the tour offer hotel pickup?

Pickup and drop-off are available if you select that option. The pickup may use a nearby walking point instead of your hotel, and the provider sends the exact location and time by email. The pickup option departs from Athinios Port at 9:45 a.m.

Is the volcano hike required?

No. The hike to the crater is optional. If you take it, the entrance fee is €5 and must be paid in cash.

How much walking is involved?

A moderate amount of walking is involved. The volcano has uneven rocky ground, and reaching Manolas on Thirassia requires climbing many steps.

Do I need to be a strong swimmer?

You should be comfortable swimming from the boat toward the hot springs. Foam noodles are provided for less confident swimmers, while life jackets are given only in an emergency.

Is food included?

No. Food is not included, but you can buy lunch at restaurants on Thirassia. Drinks are available for purchase from the onboard bar.

Is the cruise wheelchair accessible?

No. The tour is not suitable for wheelchair users and is not recommended for people with walking disabilities or for strollers because of uneven surfaces.